PLATE I 
Fig 3 Fig. 4 
Fig 1 — Shews a pseudo-cyst (Malpighian Corpuscle) in early stage. Central cells squamous or 
breaking up. Nuclei stain faintly. Peripheral cells proliferating. Edge of 
sarcomatous mass below. 
Fig. 2 — Shews pseudo-cyst later. Centrally squamous cells breaking up into ribbons. Fibrillation 
distinct. To the left a sarcomatous out-growth from the periphery. 
Fig. 3 — Shews complete fibrillation of interior of pseudo-cyst. Sarcomatous tissue below. 
Fig. 4 — Shews tubules with broken contour, from the cells of which originate, by proliferation, 
a mass of round or irregular cells ; the alveolar arrangement not being re-produced. 
